Phonograph starting and stopping device



May 20, 1930.

:J. R. NOCK ET AL PHONOGRAPH STARTING AND STOPPING DEVICE Filed May 26. 1928 INVENTORJ 04 27 A TTORNE y Patented May 20, 1 930 UNITED STATES PATENT OFFICE JOHN ROWLAND ROCK AND CECIL JOHN NOCK, OF BROQKLYN, NEW YORK rHoNoGRn-PH; STARTING AND STOPPING DEVICE Application, filed May 26,

This invention relates to phonograph starting and stopping devices and in particularto one in which few working parts are neces, sary.

p r cul r provide a device which will be operated automatically, not only to stop the phonograph turn-table when thetone arm has reached the end of the selection but will be also oper- MI' able automatically to permit the starting of the turn-table when ]the' tone arm hasbeen swung to apoint adj acent theouter periphery thereof, or inpositionto start the playing of the record. v V 15 A still further object of the invention is to provide in connection with the tone arm, a. starting and stoppingfcontrol, device which will be operated by themovement of the tone.

arm. 7

To enable others skilled in the art to fully comprehendthe. underlying features of our invention that they may embody the, same in the various modifications in structure and relation contemplated, a drawing depicting a preferred form has been annexed as a part of this disclosure, and in such drawing, similar reference charactersdenote correspond ing parts throughout all the views, of'which,

Figure isa top planview ofan automatic starting andstoppingdevice shown .in position adjacent the turntable ofa phonograph, a fragment of the turntable and part of the tone armin one position being shown I in outline and several of the operating positions of the device being also shown in outline. i

Figure 2 is a section taken on the line 22 of Figurel and illustrates how the device is secured to the upright portion of the tone arm and in position to underlie the turntable, and i a w a Figure 3 is a section taken on theline 3+3v of Figure 2 to show how theoperating arm pin is moved by thefoperating armto, throw the pad against the down turnedflange of h urn-tabl i Re r n t h draw in d aitfi i dicates a tone arm base which mounted 50' the usual manner, and is arrang d to hold n object of the invention is to on the top surface of the phonograph-6, in

1928. Serial No. 280,755.

pivotal position, the tone arm 7. This tone arm is provided with a vertical portionand 1 a horizontal portion 8, the latter of which at its outer extremity carriesthe reproducing unit 9, which, as is well known, carries the record engaging needle. i v V K The turmtable which carries the record, is indicated by thenumerallO andis provided with a depending edge flange 11, against the inner surface of which, is arranged to contact, the brake pad 12. This pad 12 is carriedon the end of the stop lever 13 which is connected through the medium of the spring 141 with; a pin 15 secured in the base plate 16,

the base plate 16 being fastened to the phon} ograph top 6 in position to permit the free swinging movement of the stop lever 18 so that the pad 12 can'be movedout-of and into contact with the flange 11 of the turntable 10. fThis stop lever is pivoted to the 7 base plate as at 17 and isprovided with an extended arm portion 18, the latter of which is also provided with a pin 19 which engages v within a slot'20 'ofan elongated character provided in the control arm 21. This control arm is pivoted atone of its ends as at 22 to theouter end of, the carrying arm 23, which arm, in turn, is secured as at 24 to the flange portion 25 of the upright part of V thetonearm'i. i It is quite evident that the arm 2 'Will have swinging movement with the tone arm and due to the pivotal connection of the arms 21 and 23, both of them may assume the position illustrated in outline at the left in Fig, ure 1. This outline position of each of the arms 21 and 23 in this instance coincideswith that of the tone arm which is also shown in outline and is in the reset position and the swinging movement of the arm 23 has drawn 90 upon the arm 21 to pull on the pin 19 with the result that thestoplever 13 is thrown from its full line to it dQb ed line position because thespring 14L will'passthe pivotal center 17 of the lever 13 and will cause the lever to snap to the position shown in outline in Figure 1. At this time the record starts playing because the stop 0; brake pad 12 has beenremoved from its contact with the flarge' l o t e t rna e and the wee arm travels across theface of the record hen the needle has reached the last groove and the playing of the record has been com-' 7 pleted, the parts will be in the position illustrated in full lines inFigure 1, that is, the arms 21 and 23 Will have assumed posit ons whereby the pin 19 will have been engaged pad12 into contactturn-table. 1 1 t "In order that the throw of the lever 13 by the end 26 of the adjusting screw 27 and v will have been moved to a position where the spring 14' will be on the opposite side of the pivotal pin 17 and will consequently throw the with the flange 11 of the may be controlled, the adjusting screw 27, which is provided with aknurled thumb. nut

28 and is threaded throughout its length has.

adjustable movement through an upturned lip 29 formed on the arm 21, the extreme end of the adjusting screw 27 being provided 7 with a reduced'portion 30andapeened over I head 31' which maintainsin position "onthe end vofthescrew, the guide 32. 'The lower sitions of the arms21 and 23 is also shown in outline position-in Figure l It is quite evident thatin the playing of a record embodying a short selection, it would be necessary toadvance the adjusting screw p 27 to. a point where it would operate the stop itwill'have ,a'itendency-when the lever is lever 13 more quickly than in the playing angel. 1

of a record wherethe selection was of greater 1 1 is connectedin such amanner to the stop lever 13 that it will be double acting, that is,

thrown to a position so that the sp'ringll passes over the pivot point 17 to draw the pad .12 andsnap lit in the position shown in outline, while in its opposite movementfit will have a tendency to urge the pad 12 into contact with the flange ofthe turn-table.

7 'It is evident, thereforeithat we have provided a phonographlturn-table startingand .stoppin'g'device, which comprises few parts,

which maybe readilypositioned on any phonograph and which willdo awaywith the necessity of having tormanually stop the turn-tableat the end of each selection I It will be noted, also,that instead of rivet-o,

ing the end of the arm'23 to the tone arm,

'the same maybe fastened with a suitable.

gripping clampso that itcan be removed or replaced at will... 1 i

It is evident',,also, that our improved device isadaptable for use in connection with any phonograph employing a tone arm and It will; be especiallynoted that the springthe entire mechanism will be substantially concealed by the turn-table and will not in-' terfere with the eflicient operation thereof.

WVhile we have illustrated and described our invention With some degreeof particularity, We realize that in practice various alterations therein 'may be made. We therefore reserve the right and privilege of chang ing the form of the details of construction or otherwise altering thearrangement of the correlated partswithout departing from the spirit of the invention or thescope of the appended claims.

. Having thus described our invention, what we claim as new and desire to secure by United States Letters Patent is I 1. The, combination' with ar'phonograph;

having arecord carrying turn-table and a tone arm'movable thereover, of abaseplate secured beneath said-turn-table,a lever pivot ed thereto, a spring connecting the lever and the base plate and arranged to. move across 7 thepivot point to urge the lever toward'ori away from the edgeofthe turn-table and an arm "carried by thetone arm for controlling the movements of said lever. E Y

'2. The combination with a-lphonograph 7 having a record carrying turn-table and a tone arm movable thereover, of a'base plate secured beneath said turn-table,-a lever pivjoted thereto and' arranged to engage-a down.-

turned edge of the turn-table, a spring con nesting the lever andthe base plate and arranged to move across the pivot point to,- 1 V urge the lever toward'or away from. the edge ,of the turn-table, an extension on the tone arm, an operating a'rmjpivoted thereto, and a pin'and slot connection between the operating arm and said lever, 3

v3. The combination with a phonograph having a record carrying turn-tableand a tone arm,movablethereovenof a base plate secured beneath said turntable, a lever pivoted thereto,'a spring. connecting the lever and the base plate. and arranged to move across the pivot point to urgethe lever toward .7

or away from the edge Iofthe turn-table, a

pin on the end ofthe lever,1an"exten sion .on the tone arm, a slotted operating arm pivoted 7 thereto, theslot receiving the pin and er. initting movement thereoflongitudi'nally of said arm, and an adjustable member in said 7 slot for limiting the'movement of said pin. 1

4. The combination with phonograph having a record carrying turn-table and a tone arm movable thereover of a base plate oted thereto, a spring connecting the lever and 'the base plate and arranged to move across the pivot pointto urge the lever t0-v secured beneath said turn-table, a lever pivward'or "away from the edge of the turntable, a pin 011 thelever, an extension on the tone arm, a slotted operating arm pivotedv tl1eret o,said s'lotbeing arranged to receive the pln, whereby the arminay have'movement relatively to the lever to cause throw of the same into starting and stopping positions, an adjusting screw on the arm and a traveller in the slot carried on the end of said screw for controlling the operation of the Starting and stopping lever.

In testimony whereof We afiix our signatures. 7

JOHN R. NOGK. [11. 5.] CECIL J. NOCK. [1 s.] 

